Countries such as China, South Korea, New Zealand, the UK and most European countries, have now reduced this value to below one. In other countries, such as
Sweden or Russia,
the value of R remains near or above one, reflecting the increase in the number of cases.
(Källa: Theconversation.com)
Varför redovisar inte våra myndigheter vad exakt R ligger på? Varför måste man läsa det i utländsk press?
As long as there are susceptible and infected people in the population, the virus can spread. Evidence is accumulating that the first wave of the epidemic resulted in
only limited immunity, well below herd immunity levels.
The virus could mutate resulting in a more infectious strain. Such a mutation might have caused the second middle wave of Spanish flu to be particularly severe. If something similar happened for SARS-CoV-2 virus, the resulting epidemic would dwarf the current outbreak even if the new R value was only four, compared with 10-12 for mumps or 12-18 for measles. Mumps and measles are only kept from spreading widely by vaccination.
https://theconversation.com/coronavirus-what-a-second-wave-might-look-like-138980